Lyric discussion by MarcelLionheart 

Cover art for The Infanta lyrics by Decemberists, The

^^Unfortunately, that's not correct.

Colin has mentioned that it is about a ceremony held in Spain in 1824. This would mean that the Spanish infanta in the song is none other than Luisa de Borbón, Infanta de España. I'd like to do more research on the ceremony and who the Baron and Baroness are. They are not her parents because Luisa de Borbon's parents were The Duke of Cadiz and the Princess of the Two Sicillies